Barry, glorified Uber driver

So when Oliver needs to catch up to Cayden in time, he calls Barry, presumably, to give him and John a lift, but he doesn't ask him to help do a sweep of the city to look for the bomb, or round up Cayden's coconspirators, or even just tag along during the standoff, to disarm Cayden just as quickly as he delivered Oliver and John, and wouldn't even need to see his face or call it a real crossover....??